Paster for cigarette machines



Nov. 13, 1962 Filed May 8, 1959 M. E. PHILLIPS, JR.. ETAL FASTER FORCIGARETTE MACHINES 2 Sheets-Sheet 1 "Fig 1A H INVENTORS J esse R. Plnkmm'nlalcolmEPhilli sJk.

Nov. 13, 1962 M. E. PHILLIPS, JR., ETAL 3,053,411

FASTER FOR CIGARETTE MACHINES Filed May 8, 1959 2 Sheets-Sheet 2 0INVENTORS UP I 9 1O JesseRPinkham malcoLmIEPhillimJh.

ATTORNEY rates 3,063,411 Patented Nov. 13, 1962 ice 3,063,411 FASTER FORCIGARETTE MACHINES Malcolm E. Phillips, Jr., and Jesse Randolph Pinkham,Raleigh, N.C., assignors to American Machine & Foundry Company, acorporation of New Jersey Filed May 8, 1959, Ser. No. 811,978 11 Claims.(Cl. 118-600) This invention relates to paste-applying apparatus forcigarette making machines, and more particularly to containers and meansfor feeding paste from containers to the applying apparatus in suchmechanisms.

In one broad class of such paste applying devices, it is a commonpractice to supply the paste in separate containers. These containersare mounted in the mechanism and paste is extruded therefrom by means ofa piston which may be actuated by a variety of methods. With thissystem, it is necessary to stop the cigarette-making machine to replacethe paste container when it is empty. This involves removing the emptycontainer, readjusting the pressure applying apparatus to accommodate afilled container, fitting a filled container into the mechanism, andagain readjusting the pressure applying device to the working positionbefore the machine is ready to start. This involves loss of productionwhilst the machine is being prepared to accept a filled paste container.It also necessitates a double supply of containers, one being in use onthe machine, while the other is being cleaned and refilled.

It is the frequent practice to arrange the change from empty to filledcontainers at a specified time of day in order to minimize down time.This invariably involves changing containers before the old ones areempty and wasting whatever paste they may contain, for it is notpractical to refill dirty, part empty containers.

One of the objects of this invention is to provide a paste applyingmechanism, the container of which may be replenished with paste whilstthe machine is in operation.

Another object of this invention is to eliminate the necessity fortransporting the individual paste containers to separate machines.

Another object of this invention is to make possible the replacement ofpaste in the container of the paste applying mechanism withoutinterfering with the normal production of the machine.

Another object of this invention is to make possible the refilling ofthe paste container of a paste applying apparatus before that containeris empty so that the paste not yet consumed at that time is stillavailable for consumption. Another object of this invention is toprovide means for feeding paste from a closed container by means offluid pressure.

Another object of this invention is to provide means whereby pressure ismaintained on the paste contained in the apparatus when the machine isat rest so that said paste may be ready for instantaneous feeding theinstant the machine is put into motion.

Another object of this invention is to provide an extensible andcollapsible separator diaphragm between the paste to be fed and thepressure applying means used to feed the paste.

Another object of this invention is to provide means to indicate thequantity of paste remaining in the mechanism at all times.

Other objects and features of the invention will appear as thedescription of the particular physical embodiments selected toillustrate the invention progress. In the accompanying drawings whichform a part of this specification, like characters or reference havebeen applied to corresponding parts throughout the several views whichmake up the drawings.

FIGURE 1 is a diagrammatic view partly in section of a side elevation ofone form of the mechanism.

FIGURE 1A is an enlarged view of the indicator shown in FIG. 1.

FIGURE 2 is an enlarged view of the filling connection shown on FIGURE1.

FIGURE 3 shows one form of quick release clamping device suitable foruse in holding together the parts shown in FIGURE 1.

FIGURE 4 shows a side elevation of the clamping device, FIGURE 3.

FIGURE 5 shows diagrammatically the position of the extensible andcollapsible separator when the container is approximately two-thirdsfilled with paste.

FIGURE 6 shows the same extensible and collapsible divider in theposition it would occupy when the container is approximately one-thirdfilled with paste.

FIGURE 7 shows a diagrammatic side elevation of an alternative form ofthe apparatus partly in section.

FIGURE 8 shows a side elevation of the method employed to drive thefluid pump employed in the apparatus shown on FIGURE 7, with particularreference to means for overriding the mechanical drive.

FIGURE 9 shows a side elevationof FIGURE 8.

FIGURE 10 shows a milling device which may be employed in the apparatus.

One embodiment of this invention will now be described in relation toFIGURE 1.

A pipe 10 is connected to a source of fluid under pressure; such a fluidmay conveniently be air. A regulating valve 12 and a pressure gauge 14may optionally be provided in the pipe 10 in order to control andindicate the pressure of fluid reaching the apparatus. The continuationof pipe .10 in the form of the portion '16 is transparent in order thatthe pointer 26 may be viewed the'rethroug-h, to indicate the position ofthe diaphragm 22 in a-manner to be described. The vessel proper consistsof two portions, 18 and 20, clamped together by any convenient means,such as the quick-release clamp 24.

Between these two halves of the vessel, an extensible and collapsibledivider 22 is provided, which divider separates the fluid pressureentering the vessel 18 via pipe 10 from the paste which is contained inthe vessel 20. The pointer 26 is fastened to the diaphragm 22 and moveswith it to indicate its position through the transparent portion of thepipe 16.

Connected to any suitable position of the vessel 20 is a pipe 30. Thiscommunicates with a nozzle 34, which is pressed against a wheel 36 inorder that the paste issuing through the hole 54 may be spread on theperiphery of the wheel 36, from which it is transferred to the wheel 44for final deposition on the cigarette paper wrapped around the tobaccorod 46. As the paste passes through the pipe 30 on its way to the hole54, it may pass through an optional device marked 32, said device beingin the form of a pump, a stirring device known in the industry as apaste milling device, or a simple valve which serves to close the hole54 when required.

The device indicated at 32 may be driven from some portion of thecigarette making machine so that it stops and starts with that machine.Motion is transmitted from the cigarette making machine by means ofshafts 39 and 39'. Sprocket 42 is keyed to shaft 39'. Sprocket chain 40transmits power to sprocket 38 which is operatively associated withdevice 32 so that the whole of this mechanism stops and starts with thecigarette making machine.

The operation of the paster may be briefly described as follows:

Air or other fluid enters the pipe 10 under suitable pressure from asource of supply common to a number of machines. The regulating valve 12and pressure gauge 14 are not necessary for this particular mode ofoperation and may be omitted. The air under pressure will press upon thediaphragm 22, causing it to transmit its pressure to the paste containedin the vessel 20. This pressure will cause the paste to be driventhrough the pipe 30 and, in this case, through the device 32 which wouldconsist of a simple valve which would be open when the machine isrunning. This permits the paste to pass through the hole 54 to be spreadby the nozzle 34 on the wheel 36, from which it is scraped by theperiphery of wheel 44 for final spreading on the moving cigarette paperweb 46.

Under these conditions, it will be seen that a very simple mechanism isenvisaged, it being necessary only to supply the air to press on thediaphragm 22in order to feed the paste in the desired fashion. Thedevice 32 may be manually operated or may be operated automatically byany known means, so that it is open when the machine is running andclosed when the machine is stationary, so ensuring that the paste flowsonly when required.

The diaphragm 22 may be constructed in a variety of ways. One convenientmethod is to use a rubberlike material so that it may follow preciselythe amount of paste contained in the container 20, but otherconstructions are possible; for instance, a pleated diaphragm made of asemi-flexible material would serve almost as well.

A second alternative mode of operation would consist of the mechanismdescribed above with the exception that the regulating valve 12 andpressure gage 14 would be added to control the pressure of air enteringthe apparatus, so as to permit individual control at each machine of theamount of paste fed. It will be appreciated that in the first embodimentdescribed, the air pressure would have to be maintained at a constantfigure in order that all machines may feed the correct amount of paste,but by the addition of the regulating valve 12, the main supply of airpressure may be permitted to fluctuate, and variations in paste fed todifferent individual machines may also be obtained by varying the airpressure by means of the regulating valve 12.

In yet another embodiment, the device 32 may be replaced by a pump. Inthis case, the regulating valve 12 would be unnecessary, it merely beingrequired that the air pressure entering the pipe is sufficient to causethe paste to flow through the pipe 30 up to the pump. The pump is of thepositive displacement type, and is designed to contain the pressure ofthe paste when said pump is stationary. In this case, the pump is drivenat a suitable speed to deliver the desired quantity of paste through thehole 54 to the nozzle 34 so that, the pump constitutes a metering devicefor measuring the quantity of paste delivered to the mechanism.

The pump also performs a secondary function which may, with certaintypes of paste, be extremely important. It is well known that someclasses of paste used in cigarette manufacturing are thixotropic, whichentails that the paste must be violently churned or agitated just priorto application to the cigarette paper Web, in order that the bestresults may be obtained. The pump performs this churning function whilstmetering the paste, a suitable pump for this purpose being the wellknown gear type pump which does not permit a straight through flow offluid being pumped.

A third variation of this device substitutes for the pump 32 a deviceknown as a milling device, the term milling in the industry being takento indicate the violent churning or stirring necessary for use when athixotropic paste is employed. Such devices commonly consist of a screwthread mounted in a cylinder so that the groove of the thread provides aserpentine path through which the paste must travel on its way from thecontainer to the paste delivering hole, the said screw thread beingslowly rotated in order to increase the churning effect of the paste ramount of paste contained in the device.

in traveling through this serpentine path. Such a device could be usedin place of the pump 32 in order to operate on the thixotropic paste,leaving the pressure as provided by the regulating valve 12, to controlthe amount of paste flowing therethrough.

From this it will be seen that many variations exist around the broadprinciple illustrated.

One feature of this device is to permit the paste supply containedtherein to be replenished at any time and to avoid wasting paste as isdone at the present time when an almost empty container is removed and afull one substituted in its place. In this case, a new supply of pasteis forced into the vessel 20 through the connection 23, and it will bequite obvious that this may take place at any time without stopping themachine, for the forcing of the paste 28 into the container 2t} willcause the diaphragm 22 to move against the fluid pressure on itsopposite side to so accommodate the new volume of paste in the vessel20. At the same time the pressure exerted by the fluid on the other sideof the diaphragm 22 will remain substantially unchanged by thismovement, so permitting the continued operation of the machine withoutany sort of interruption whatsoever.

FIGURE 2 shows an enlarged view of the connection 28, FIGURE 1, showingone means of providing for the filling or replacement of paste in thevessel 20. This shows mechanism very similar to an ordinary grease gunfitting, it being appreciated that any non-return valve of this sortwill be suitable for the apparatus. It is proposed with this device thatapparatus very similar to lubrication equipment be employed, and it willbe seen that the normal grease gun, which in this case will be filledwith paste in place of grease, would fit over the projection 52 of thisconnection to hold the gun in place, permitting paste to be pumpedtherein by any suitable method, said paste lifting the ball valve 5411against the spring 56 to flow inwardly and so tofill the chamber 20 byany convenient amount. The indicator 26 permits the operator to see whenthe apparatus is suitably filled. It will be readily understood thatupon removal of the fitting which is hooked around the projection 52,the internal pressure exerted on the paste will cause the ball valve 54to seat itself and so contain said pressure, the spring 56 helping inthis operation.

FIGURES 3 and 4 show one method of clamping the two vessels 18 and 20together with the flexible diaphragm 22 between, as is required for thisapparatus. In this device, the stem is connected to a handle 48 at oneend and a cam shaped member 50 at the other. By turning the handle 48,the cam shaped member 58 will engage the flange provided on the vessel18 and so clamp the vessel 18 towards the vessel 20 with the diaphragm22 between, making a suitable joint thereby. A number of these deviceswill of course be disposed around the circular flange of the vessel 18in order to contain the pressure. This is the only one of many methodswhich could be used for this purpose.

FIGURES 5 and 6 show the apparatus with the extensible and collapsibledivider 22 in varying positions.

FIGURE 5 shows the apparatus about two-thirds filled with paste, and itwill be seen that the diaphragm 22 is extended to one side toaccommodate this paste. At the same time, it carries the pointer 26 withit, indicating through the transparent window in the portion 16 theReferring to FIGURE 6, the diaphragm 22 is shown with the apparatus asit would be when only about one-third filled with paste. Here it will beseen that the diaphragm 22 is moved under the influence of the airpressure to the opposite side of the center line, carrying with it thepointer 26, again indicating the quantity of paste in the apparatus.

Generally speaking, the paste container is closed at all times and airis excluded therefrom, so that it will seldom need cleaning internally.However, cleaning undoubtedly will be necessary at some time or another,and for aosaaii this reason the quick release devices similar to thoseshown in FIGURES 3 and 4 are employed to facilitate the dismantling ofthe apparatus.

As stated above, item 32 of FIGURE 1 is either a pump, a milling device,or a simple valve. These three items would have one feature in common,and that is that they are designed to contain the paste pressure at alltimes, so that when the pump and milling device are stationary or whenthe valve is closed, paste will not flow through the hole 54 to theapplying apparatus. Thus, when the machine is stationary, air pressurewill be maintained at all times on the diaphragm 22, keeping theapparatus in readiness to start without time delay, for the paste invessel 26 will be under pressure at all times. Immediately when themachine is started, the pump or milling device will commence to rotate,thereby feeding the paste to the applying device, or in the case of asimple valve in the position 32, the valve would be opened, permittingthe same thing to take place. In this way, the apparatus is readyinstantaneously, which is not the case with all known devices.

FIGURE 7 shows yet another embodiment of this invention, in which thepressure on the diaphragm 22, which is used to feed the paste from thevessel 20, is applied by means of a substantially incompressible fluidin place of the compressible fluid employed in the previous examples.Said fluid may conveniently be oil or other similar liquid, and iscontained in a reservoir 58. From here it is withdrawn by means of pipe60 by a positive displacement pump 62 to be delivered via thetransparent connection 16 into the vessel 18 where it presses on thediaphragm 22 as in the case described above. Here, the pump 62 will bedriven by and in timed relationship with the cigarette making machine sothat it runs only when the machine is running and when paste is requiredfor the purposes of completing the cigarette rod 46.

Oil pumped into chamber 18 will displace an equal quantity of paste fromchamber 20. The quantity of paste delivered may therefore be controlledby controlling the speed of rotation of pump 62. With such anarrangement, it may be advisable to employ a valve, 32 to close off thepipe 34 when the machine is stationary, for it will be understood thatthe whole of the vessels 18 and 2d, are under internal pressure and somepaste may be extruded through the nozzle in relieving this pressuredepending upon the fit of the nozzle to the wheel and the rigidity ofthe containers 18 and 2t), and the associated connecting lines. Thiswould, of course, feed paste when the machine is stationary, which isundesirable, for such paste would be extruded in a mass around nozzle 34onto stationary wheel 36, the mass being carried forwardly on wheel 36when the machine is restarted to completely foul the transfer wheel 24.

The valve 32 may be operated manually or automatically, so that when themachine is stationary this undesirable state of affairs does not occur.This also has another advantage inasmuch as the pressure contained inthe vessels 1% and will be maintained so that the machine is ready forinstantaneous starting when restarted after stopping. It will beapparent to one skilled in the art that such a device, no matter howwell constructed, will not maintain pressure such as this indefinitely,and should the machine be allowed to rest for long periods of time, say,for thirty minutes, the pressure would gradually bleed out from thesystem, causing difficulties in starting which may be overcome as willnow be described.

One way of making automatic valve 32 consists in connecting thereto anelectrical control means 33 which is connected to the circuit of themotor driving the cigarette making machine. This control opens valve 32when the machine is started and closes it when the ma- 'chine isstopped.

As stated above, the pump 62 is a positive displacement pump whichdelivers oil at exactly the same rate as the paste is required to leavethe vessel 20 via pipe 30. This can only occur when the whole of thevessels 18 and 26 are under an equilibrium pressure. After a period ofstoppage when the internal pressure is virtually zero, it will benecessary for the pump 62 to build up this pressure before the pastecommences to feed at the desired rate through the pipe 30. Under normalmachine running conditions, this would take perhaps thirty seconds oreven a minute, depending on the elasticity of the vessels 18 and 20,thus causing difficulties in obtaining the correct amount of paste onthe cigarette rod paper 46 at starting. In order to overcome this, it isnecessary to devise means for quickly increasing the pressure in thevessel 18 after stopping for extended periods and one method of doingthis is to provide devices whereby the pump 62 may be manually orautomatically rotated at a rate faster than normal, so that duringperiods of starting, the amount of oil delivered by said pump may be inexcess of the amount of paste required from the apparatus to compensatefor the elasticity of the containing vessels. One method of doing thisis shown in FIGURES 8 and 9.

Here, the pump 62 is driven by a chain 68 from some portion, not shown,of the cigarette making machine, so that said chain moves when themachine is in operation, and is stationary when the machine isstationary. This chain cooperates with sprocket 70 and drives shaft 72,to which is fastened a disc member 74 carrying a pawl 76 which in turndrives the ratchet wheel 80 which is keyed to the shaft '78 to drive thepump 62; thus, the pump is driven in synchrony with the cigarette maker.

Attached to the ratchet wheel 80 is a second ratchet wheel 82;, whichalso is iigidly keyed to the shaft 78 and turns at all times with theratchet 80. When the machine is running, it will be understood that thepump 62 will be rotating at a comparatively slow speed, for the amountof paste normally required from a device of this sort is very small.This makes it possible to override the manual pump drive by means of thepawl 84 which cooperates with the ratchet wheel 82, said pawl 84 beingconnected to a hand lever 86, so that by merely oscillating the handlever 86, the pawl 84 will engage withthe ratchet Wheel 82 to rotatesaid ratchet wheel, causing it to override the pawl 76 even when themachine is running. The hand lever 86 need only be oscillated for a"short period less than the time necessary for the pump 62 to build upthe desired pressure. Thus, the pump may be caused to delive an excessof oil at starting by any amount according to the operators will.

It will be appreciated that many other methods exist for overriding thepump drive. For instance, the ratchet wheel 82 and pawl 84 may beactuated by causing the lever 86 to be automatically oscillated by meansof a solenoid device. Alternatively, an electric motor could drive agear mounted on shaft 78 to over drive the pump, said motor beingcontrolled by a centrifugal switch responsive to the main machine speed.

With this embodiment, the method of replenishing the paste in the vessel20 will require somewhat different operation from that employed in theother embodiments, for in this case, paste is extruded from the vessel20 by positive displacement by oil which is pumped into the vessel 18,thus rendering it impossible to pump paste into the vessel 20 unlessspecial provisions are made.

These provisions consist of a secondary connection 64 and a relief valve66, which valve is adjusted to contain the working pressure necessary tofeed the paste under normal conditions but which will permit the outwardflow of oil from the vessel 18 should the pressure therein becomeexcessive. in this way, paste may be pumped into the vessel 20 via theconnection 28 in the manner already described, the diaphragm 22accommodating the varying amount of paste being introduced. It will beseen that the introduction of paste in this way will cause the pressurewithin the vessels 18 and 2 0 to be raised somewhat above the normal,causing the relief valve 66 to lift to permit oil from the vessel 18 toreturn via pipe 64 into the reservoir 53. Thus, paste may be introducedto the vessel 2%? at any time without interrupting the operation acaaau7 of the cigarette maker exactly as was done before, the quantity ofpaste in the vessel 20 being indicated by the indicator 26 through thetransparent window in the portion 16.

It is well known in the art to apply paste directly onto the cigarettepaper on cigarette rod 46 by means of a nozzle, connected directly to asource of supply of paste under pressure, then dispensing with thenozzle 34 and wheels 36 and 44.

The apparatus described here is entirely suited to this mode ofoperation.

Again, this embodiment includes an extensible and collapsible diaphragm2.2 to separate the fluid under pressure from the paste being fed, saiddiaphragm forming a partition substantially bisecting the main pressurevessel.

It will be obvious that many other forms exist for this separator whichwould function equally well.

For instance the paste could be contained in a collapsible flexiblebottle shaped member, completely surrounded by the pressure fluid whichwould force the paste out of the bottle by collapsing it, alternatelythe pressure fluid could be introduced into an extensible bottle shapedmember, which is completely surrounded by paste which would be displacedfrom the main containing vessel by the expansion of the bottle by reasonof the fluid under pressure introduced therein.

The variations of the invention described herein are not intended to beexhaustive but have been selected to merely illustrate the inventionwhich may be varied within the scope of the claims to include manypossible embodiments.

The invention, therefore, is not to be restricted to the precise detailsof the structures shown and described.

What is claimed is:

1. Apparatus for feeding paste under pressure to the paste applyingnozzle of a cigarette making machine comprising a closed vessel tocontain the paste, an applying nozzle connected to said closed vessel,an extensible and collapsible divider separating the closed vessel intotwo compartments, a supply of fluid under constant pressure connected tothat compartment not containing paste, the divider transmitting thepressure to the paste to force it through the nozzle, said dividerconforming to changes in the volume of paste in the compartment, aconnection communicating with that compartment containing the paste, aspring loaded non-return valve in such connection to retain the pasteunder pressure and to permit the replenishment of paste in the pastecompartment as necessary.

2. Apparatus for feeding paste to a cigarette machine paster comprisinga vessel divided into two compartments by an extensible and collapsiblewall, paste applying mechanism, one compartment containing paste beingconnected to the paste applying mechanism, the second compartment beingconnected to a source of fluid under pressure, at least a portion ofthis second compartment being transparent, an indicator moving with theextensible and collapsible wall, said indicator being extended to thetransparent portion of the compartment to provide a visible indicationof the position of that wall.

3. In a cigarette making machine, apparatus for feeding paste comprisinga paster mechanism, a vessel divided into two compartments by anextensible and contractable wall, one compartment containing paste beingconnected to the paste applying mechanism, a connection for filling thepaste compartment, a spring loaded check valve in said connection topermit paste to enter said compartment and to prevent paste leaving thecompartment via the connection, the second compartment being connectedto a source of fluid under pressure, said pressure being transmitted tothe paste in the first compartment and means for automaticallymaintaining a constant pressure in said second compartment.

4. Apparatus for feeding paste to a cigarette machine paster comprisingan extensible and contractable wall,

a compartment on one side {if the Wall connected to a source of fluidunder constant pressure, a compartment on the opposite side of the wallcontaining paste, a paste applying mechanism, a connection joining thesecond compartment to the paste applying mechanism, a positivedisplacement pump through which the paste must pass on its way from thesecond compartment to the paste applying mechanism and a drive for saidpump to cause it to deliver the desired amount of paste to the pasteapplying mechanism.

5. Apparatus for feeding paste to a cigarette machine paste applyingmechanism, comprising a vessel to contain the paste, an extensible andcontractable wall dividing the vessel into two compartments, means forapplying constant fluid pressure onto the wall so as to force the pasteout of the vessel to the paste applying mechanism, a positivedisplacement pump through which the paste must pass on its Way to theapplying mechanism, a drive for said pump at the necessary speed tocause it to deliver the desired quantity of paste to the applyingmechanism, said drive being taken from a mechanism driven from thecigarette machine so that paste is delivered only when the cigarettemachine is in motion.

6. Apparatus for feeding paste to a cigarette machine paste applyingmechanism comprising a vessel to contain the paste, an extensible andcontractable wall dividing the vessel into two compartments, means forapplying constant fluid pressure onto the wall to force the paste out ofthe vessel to the paste applying mechanism, an escapcment device formetering the paste through which said paste must pass on its way to theapplying mechanism, a drive for the escapement device means operativelyconnected to the cigarette machine to ensure that the escapement deviceis driven only when the cigarette machine is running, said escapcmcnt being constructed to contain the paste under pressure when it is not beingdriven.

7. Apparatus for feeding paste to a cigarette machine paste applyingmechanism, comprising a vessel to contain the paste, an extensible andcontractable wall dividing the vessel into two compartments, means forapplying constant fluid pressure onto the wall to force the paste out ofthe vessel to the paste applying mechanism, a valve through which thepaste must pass on its way to the applying mechanism and means forautomatically opening the valve, operatively connected to the cigarettemachine, to open the valve when the cigarette machine is started andclosing it when the cigarette machine is stopped.

8. Apparatus for feeding paste to a cigarette machine paste applyingmechanism, comprising a vessel to contain the paste, an extensible andcontractable Wall dividing the vessel into two compartments, means forapplying constant fluid pressure to the wall to force the paste out ofthe vessel to the paste applying apparatus, a milling device throughwhich the paste must pass on its way to said paste applying apparatus,means for driving the milling device in synchrony with the cigarettemaker, said milling device being constructed to contain the paste underpressure when it is stationary.

9. Apparatus for feeding paste to a cigarette making machine comprisinga paste applying apparatus, a vessel divided into two compartments by anextensible and contractable wall, one compartment containing the pasteto be fed, connected to the paste applying apparatus, the othercompartment containing a substantially incompressible fluid, a positivedisplacement pump driven in synchrony with the cigarette making machineto deliver the incompressible fluid into the second compartment todisplace the extensible and contractable wall to feed paste to the pasteapplying apparatus in direct proportion to the amount of uncompressiblefluid pumped and automatic valve means for maintaining theincompressible fiuid under constant pressure.

10. Apparatus for feeding paste to a cigarette making vessel to thepaste applying apparatus, means to permit 5 the replenishment of pastein the vessel Whilst the apparatus continues to function, a reservoirfor the incompressible fluid, a positive displacement pump driven insynchrony with the cigarrette making machine to deliver incompressiblefluid from the reservoir to the vessel, a 1

connection between the fluid side of the vessel to the fluid reservoir,said connection being normally closed by means of a relief valve whichis adjusted to permit the return of the incompressible fluid from thevessel to the fluid reservoir when the extensible and contractable wall15 is displaced during the paste replenishing operation, but which willcontain suflicient pressure to feed the paste to the paste applyingapparatus at all times.

11. Apparatus for feeding paste from a vessel comprising a vessel tocontain the paste, a paste applying appara- 20 tus communicating withsaid vessel, said vessel being divided by a separating wall which willaccommodate changes in volume of the contained paste, a supply of asubstantially incompressible fluid under pressure to press on the wallwhich in turn presses on the paste to feed it, a pump to supply theincompressible fluid under pressure, a drive for the pump which ispositive, an auxiliary drive and means to permit the auxiliary drive tooverride the positive drive when it is necessary to drive the pumpfaster than normal.

References Cited in the file of this patent UNITED STATES PATENTS856,823 Tickner June 11, 1907 1,911,094 Skoglund May 23, 1933 1,939,611Purvis Dec. 12, 1933 2,168,396 Davis Aug. 8, 1939 2,511,626 EinbeckerJune 23, 1950 2,549,579 Dearsley Apr. 17, 1951 2,571,476 Offutt Oct. 16,1951 FOREIGN PATENTS 1,040,891 Germany Oct. 9, 1958

